Selena Gomez Has Lupus (So Says Grandpa)

Selena Gomez is quietly fighting lupus, according to the singer/actress’ paternal grandfather. Lupus is an autoimmune disease in which the body’s immune system attacks healthy tissue. The one-time star of Disney’s Wizards of Waverly Place was diagnosed with the potentially life-threatening condition “a couple of years ago,” Ricardo Gomez told Hello! magazine Thursday. “She’s in…